2018
DOI: 10.1038/s41598-018-20581-0
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Reversing Coffee-Ring Effect by Laser-Induced Differential Evaporation

Abstract: The coffee-ring effect, ubiquitously present in the drying process of aqueous droplets, impedes the performance of a myriad of applications involving precipitation of particle suspensions in evaporating liquids on solid surfaces, such as liquid biopsy combinational analysis, microarray fabrication, and ink-jet printing, to name a few. We invented the methodology of laser-induced differential evaporation to remove the coffee-ring effect. Without any additives to the liquid or any morphology modifications of the… Show more

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Cited by 47 publications
(44 citation statements)
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“…2 e). To reduce the thermal effect of laser on drop evaporation, laser was irradiated at low light intensity 40 . Polystyrene particles (PSP) of 1 µm in diameter were selected as tracing fluorescent particles to ensure the similar theoretical v sed value with those of AuNPs and ultrafine A1 dust particles.…”
Section: Resultsmentioning
confidence: 99%
“…2 e). To reduce the thermal effect of laser on drop evaporation, laser was irradiated at low light intensity 40 . Polystyrene particles (PSP) of 1 µm in diameter were selected as tracing fluorescent particles to ensure the similar theoretical v sed value with those of AuNPs and ultrafine A1 dust particles.…”
Section: Resultsmentioning
confidence: 99%
“…In addition, it accelerates the drying process and the formation of a hard coating. The effect of laser heating of the droplet apex on the deposition structure of colloidal particles was compared with heating of the entire substrate in [12]. A similar experiment was performed with a drop of saline solution on hydrophobic and hydrophilic substrates [13].…”
Section: Introductionmentioning
confidence: 99%
“…Например, воздействуя на каплю ультразвуком в процессе ее высыхания можно добиться исчезновения эффекта «кофейного кольца» [9]. В ряде работ используется электросмачивание [10,11] или лазерное излучение [12] для равномерного нанесения покрытия на подложку. В работе [13] исследовано влияние поверхностно-активных веществ на форму «кофейного кольца».…”
Section: Introductionunclassified